G126.1-0.8-14: A MOLECULAR SHELL RELATED TO SH2-187

S. CICHOWOLSKI; S. PINEAULT; R. GAMEN; M. E. ORTEGA; M. E. ARNAL; L. SUAD

Florianópolis, SC, Brasil

Congreso; LARIM 2013: XIV Latin American Regional IAU Meeting; 2013

We present a multi-wavelength study of a regionwhere a well defined molecular shell, named G126.1-0.8-14, is observed. The distance of G126.1-0.8-14is about 1 kpc. Based on HI and CO data we analyzethe atomic and molecular gas related to thestructure and estimate its main physical properties.From the radio continuum and infrared data we analyzewhether the emission associated with G126.1-0.8-14 has a thermal origin. To disentangle the possibleorigin of the shell, and given the lack of cataloguedO-type stars in the area, we observed withGEMINI the spectra of four OB stars located in projectioninside the shell, to get their accurate spectraltypes and distances. The young HII region Sh2-187is located onto the densest part of this molecularshell. A search for young stellar object candidates(cYSOs) was made using infrared point source catalogs.Several cYSOs are found spread out onto theshell. Based on all the available data, we discuss thepossible origin of G126.1-0.8-14 as well as its rolein the formation of a new generation of stars.